Daikin FTXP20-71L Service Manual page 130

3 | Components
To perform an electrical check of the specific thermistor
Service manual
130
Is the thermistor correctly installed
(thermal contact between the
thermistor and the piping)?
Yes
No
1 First perform a mechanical check of the thermistor, see
4
procedures" [ 129].
2 Locate the thermistor.
INFORMATION
Remove the thermistor from its holder if not reachable with a contact thermometer.
3 Measure the temperature using a contact thermometer.
Name Symbol
Air R1T
thermistor
Heat R2T
exchanger
thermistor
Discharge R3T
pipe
thermistor
Indoor unit R1T
air (room)
thermistor
Heat R2T
exchanger
thermistor
4 Determine the thermistor resistance that matches the measured
temperature.
Thermistor – Table A
T °C kΩ T °C
–20 197.81 10
Action
Perform an electrical check of the
specific thermistor, see
procedures" [
Correctly install the thermistor, see
"Repair procedures" [
Location Connector
(PCB) (pins)
Main (O/U) S90:1‑2
Main (O/U) S90:3‑4
Main (O/U) S90:5‑6
Display PCB S26:1‑2
on main
PCB (I/U)
Main (I/U) S32:1‑2
kΩ T °C kΩ
39.96 40 10.63
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
"Checking
4
129].
4
133].
"Checking
Inter- Referen
mediate ce
connector (table)
(pins)
- A
- A
- A
S27:1‑2 (on B
display PCB)
- A
T °C kΩ
70 3.44
Split Comfora R32
ESIE18-01E – 2023.01